%0 Journal Article %A Abrhan, Imrich %T Note on the Set of Nilpotent Elements and on Radicals of Semigroups %J Mathematica slovaca %D 1971 %P 124-130 %V 21 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1971__21_2_a6/ %G en %F MASLO_1971__21_2_a6